Yeah it just sounds like the battery drained out. You do need to keep them charaging when you're not using them. Most smartphones have to be recharged around once a day or every other day at the latest.

LG was having a black-out problem with 2.2 roms.. Deep Sleep Mode from Hell ! My wife had this issue on her Optimus G2X. She would set the thing down and come and hour later and it would be in black-out mode. The batteries were fine only the OS shut down and woulsd not come back up. She would have to take the battery out and put it back in and reboot.

LG fixed this issue in 2.3.3 and later... I bet you are using an older ROM still.

Here is a place jus for your phone... All you need can be found here ;-)

the battery is not drained...i charge them at least once a day...its just that when i switch it off or restart the phone...i wont turn on by pressing the power button....unless it is plugged-in to the wall charger..

the battery is not drained...i charge them at least once a day...its just that when i switch it off or restart the phone...i wont turn on by pressing the power button....unless it is plugged-in to the wall charger..

Exactly what I said. Which firmware version are you running?? stay cool, we can resolve this ....